THE NOSE. 



95 



Upper latera 

 cartilage 



The nose proper consists of a bony and a cartilaginous portion. The bony portion 

 is formed by the two nasal bones articulating with the frontal bone above, with each 

 other in the median line, and with the nasal process of the superior maxilla on the 

 side. They are supported on the inside by the upper anterior portion of the 

 perpendicular plate of the ethmoid. 

 This articulation does not extend 

 the whole length of the nasal bones 

 to their tip, but only about half 

 their length. 



The cartilaginous portion 

 consists of four lateral cartilages, 

 two on each side, upper and lower, 

 and the triangular cartilage, or car- 

 tilaginous septum on the inside. 



The external shape of the nose 

 viewed in profile is composed of 

 three portions: an upper of bone, 

 a middle of cartilage the upper 

 lateral cartilages and a lower, or 

 tip, formed by the lower lateral car- 

 tilages. The bridge of the nose is 

 formed by bone; it slopes down- 

 ward and forward and where it joins 

 the upper lateral cartilage the line 

 changes and slopes more downward, until the tip is reached, here the lower lateral 

 cartilages bulge forward, forming a rounded and more or less projecting tip. 



Injuries to the Nose. The bones and cartilages may be fractured or 

 dislocated. This may involve either the outside structures or those forming the 

 septum, and often both. The displacement depends on the character and direction 



Cartilage 

 at tip 



Nasal bone 



Septal 

 cartilage 



Lower lateral 

 cartilage 



Mesial crus of 

 lower lateral 

 cartilage 



FIG. 112. Bony and cartilaginous framework of nose, front 

 aspect. (Piersol.) 



.-; 



FIG. 113. Fracture of the nose with deflection of the nasal bone laterally. 



of the injury. It is either a displacement to one side, or the nose is crushed, 

 producing a flattening of the' bridge. If the displacement is lateral, whether by a 

 dislocation or fracture, there is liable to be a deviation of the septum, because the 

 bony and cartilaginous septum is connected with the bones and is apt to be carried 

 with them to the side. If the displacement is inward, not only are the nasal bones 

 depressed, but the septum beneath may be either bent or fractured. The pushing 

 of the septum toward the floor causes it to buckle and bend or even break at the 



